EP4135170A1 - Electric motor with improved cooling - Google Patents
Electric motor with improved cooling Download PDFInfo
- Publication number
- EP4135170A1 EP4135170A1 EP22187208.8A EP22187208A EP4135170A1 EP 4135170 A1 EP4135170 A1 EP 4135170A1 EP 22187208 A EP22187208 A EP 22187208A EP 4135170 A1 EP4135170 A1 EP 4135170A1
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- EP
- European Patent Office
- Prior art keywords
- stator
- electric motor
- shaft
- rotor
- motor according
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
Definitions
- the invention relates to an electric motor, in particular an external rotor motor, with a stator and a rotor bell which can be rotated in relation to the stator.
- Adequate cooling is of great importance for high-speed electric motors and generally for external rotor motors with improved motor utilization.
- the only option is a small annular gap, usually sealed by a labyrinth seal, in which a cooling flow can be generated between the stator housing and the external rotor.
- Such a generic electric motor is in the DE 103 13 274 A1 disclosed.
- an electric motor in particular an external rotor motor
- a stator housing and a rotor housing which can be rotated in relation to the stator housing and which has a cooling ring on its side facing the stator housing axially, with a plurality of axially facing one another in each case on the stator housing and on the cooling ring
- First and second cooling ribs are provided which are distributed in the circumferential direction and interact in terms of flow when the rotor housing is rotating, with the first cooling ribs running radially outwards in an axial plan view and the second cooling ribs being V-shaped and pointing in the circumferential direction, with a relative rotating movement of the first and second cooling fins generating a flow of cooling air at least between the stator housing and the rotor housing.
- This document relates to a motor comprising an electronics housing, a stator with a stator bush and a rotor.
- This motor has an air guiding element and an air conveying element which is non-rotatably connected to the rotor.
- the air-conveying element opens with an intake opening via a sealing gap in a flow-through opening of the air-guiding element on the rotor side in order to cool the motor.
- the invention is therefore based on the object of overcoming the aforementioned disadvantages in the prior art and providing an electric motor, in particular an external rotor motor, with optimized motor utilization for high torques, the cooling concept of which is improved at the same time.
- an electric motor in particular an external rotor motor, is proposed for this purpose, with a stator with a stator core, a non-rotatably mounted shaft which extends in the axial direction A of the motor and a rotor bell arranged so as to be rotatable relative to the non-rotatable shaft.
- the rotor bell is rotatably mounted on the shaft by means of at least one first stator end shield and between the shaft and the stator core there is a cooling device which connects the latter and which causes cooling when the motor rotates during operation, in that the cooling device has a large number of axial flow openings arranged in it for this purpose Has circumferential direction.
- the invention provides a specific connecting element between the shaft and the stator core, specifically with large openings for air to flow through and for cooling the stator.
- the cooling device has a shaft connecting the inner ring and has an outer ring connecting the stator core and forms web-shaped connecting sections which extend in the radial direction in one piece with the inner ring and the outer ring.
- the axial flow openings are located between these connecting sections.
- the connecting sections have a central middle section which is respectively wider in the circumferential direction compared to the width in the adjacent web sections adjoining this middle section on both sides.
- This is a particularly effective and yet sufficiently stable construction. Provision can be made here for the cross-sectional shape to have an essentially square basic shape, the side edges of which are curved with pronounced nose-shaped protruding corners.
- the cross section of the flow openings is larger than the cross section of the areas located radially between the flow openings.
- the rotor bell forms a second bearing plate on the rotor side, either as a separate bearing plate or integrally with the rotor bell, with which the rotor bell is rotatably mounted on the shaft.
- stator end shield is designed with cooling vanes, which extend as radial spokes between a central bearing section and a radially further outward end shield section, and openings are provided between the spokes.
- a stator flange is provided on which the electric motor or the stator is mounted and the stator end shield is connected to the stator flange, in particular via a labyrinth seal.
- stator end shield Structural integration of the stator end shield with the stator flange using a labyrinth design to ensure an increased degree of protection, since the stator end shield is designed with large openings to significantly increase motor utilization.
- An alternative or further improvement measure to increase the motor utilization is the design of the two end shields open on the stator side and closed on the rotor side with cooling fins, in particular made of aluminum.
- a cast rotor bell with an inserted FE return ring and cast-on cooling blades is provided, combined with an open design of a stator end shield with a cooling blade.
- Another preferred embodiment of the invention provides that, viewed in the radial direction, between the cooling device and areas in the stator core that is provided for the stator coils, electrical connection rings mounted in the circumferential direction and having connection wires for electrically connecting the coils are provided. It is particularly favorable if four electrical connection rings are provided for the supply, so that a supply with the 3 phases L1, L2, L3 and the neutral conductor N is made possible.
- FIG 1 a first exemplary embodiment of the electric motor 1 designed as an external rotor motor is shown in a sectional view.
- the electric motor 1 is an external rotor motor with a stator 10 with a stator core 11 and a shaft 20 which is fixed against rotation and extends in the axial direction A of the motor.
- a rotor bell 30 is also provided, which is arranged such that it can rotate with respect to the non-rotatable shaft 20 .
- the rotor bell 30 has a tubular outer casing AM and a stator end shield 31 which is fastened to the outer casing of the rotor bell 30 with fastening means B.
- the stator end shield 31 is mounted on the shaft 20 by means of bearings L.
- the electric motor 1 is provided with a stator flange 12 .
- FIG 2 there is a perspective view of an electric motor 1 with a view of the stator end shield 31.
- the stator end shield 31 is formed with cooling wings, which extend as radially extending spokes 33 between a central bearing section 34 and a radially further outward end shield section 35 , and openings 36 are provided between the spokes 33 .
- a further bearing L on which the rotor bell 30 is rotatably mounted via a second bearing plate 32 , specifically on the rotor side.
- the bearing plate 32 on the rotor side is also fastened to the rotor bell 30 by fastening means B and has a closed structure in order to ensure appropriate protection against environmental influences (eg degree of protection IP 54).
- a cooling device 40 connecting these two parts is arranged between the shaft 20 and the stator core 11 .
- This is conceptually designed in such a way that when the motor rotates during operation, the stator is cooled by the cooling device 40 having a large number of axial flow openings 41 arranged in the circumferential direction for this purpose.
- the cooling device 40 has on the one hand an inner ring 42 connecting the shaft 20 and an outer ring 43 connecting the stator core 11. Both rings 42, 43 are integrally connected to one another via web-shaped connecting sections 44 extending in the radial direction.
- the material chosen is preferably aluminum or an aluminum alloy.
- the connecting portions 44 have a central middle portion 45 which is circumferentially wider in each case compared to the width in the adjacent ones web sections 46 adjoining this central section 45 on both sides.
- the two sides are curved inwards in an arc and each have nose-shaped corner projections 47.
- the effective cross section of the flow openings 41 viewed in the axial direction is larger than the cross section of the areas located radially between the flow openings 41 . A good and efficient flow is thus achieved.
- connection rings 50 mounted in the circumferential direction and having connection wires 51 for the electrical connection of the coils 37 are provided.
- the end shield 32 can also be formed integrally with the rotor bell 30 .
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Die Erfindung betrifft einen Elektromotor (1), insbesondere Außenläufermotor, mit einem Stator (10) mit einem Statorpaket (11), einer drehfest angebrachten Welle (20), die sich in Axialrichtung (A) des Motors erstreckt und einer gegenüber der drehfesten Welle (20) rotierbar angeordneten Rotorglocke (30), wobei die Rotorglocke (30) ausgebildet mit Kühlrippen in offener, speichenförmiger Ausführung mittels wenigstens einem ersten statorseitigen Lagerschilds (31) drehbar an der Welle (20) gelagert ist und zwischen der Welle (20) und dem Statorpaket (11) eine diese verbindende Kühleinrichtung (40) angeordnet ist, welche bei Drehung des Motors im Betrieb eine Kühlung bewirkt, indem die Kühleinrichtung (40) hierzu eine Vielzahl von axialen Strömungsöffnungen (41) angeordnet in Umfangsrichtung aufweist.The invention relates to an electric motor (1), in particular an external rotor motor, with a stator (10) with a stator core (11), a shaft (20) fixed in a rotationally fixed manner, which extends in the axial direction (A) of the motor and a shaft ( 20) rotatably arranged rotor bell (30), wherein the rotor bell (30), designed with cooling fins in an open, spoke-like design, is rotatably mounted on the shaft (20) by means of at least one first stator end shield (31) and between the shaft (20) and the Stator packet (11) is arranged a cooling device (40) connecting it, which causes cooling when the motor rotates during operation, in that the cooling device (40) has a large number of axial flow openings (41) arranged in the circumferential direction for this purpose.
Description
Die Erfindung betrifft einen Elektromotor, insbesondere Außenläufermotor, mit einem Stator und einer gegenüber dem Stator rotierbaren Rotorglocke.The invention relates to an electric motor, in particular an external rotor motor, with a stator and a rotor bell which can be rotated in relation to the stator.
Bei schnelldrehenden Elektromotoren und grundsätzlich bei Außenläufermotoren mit einer verbesserten Motorausnutzung ist eine ausreichende Kühlung von großer Bedeutung. Insbesondere bei geschlossenen bzw. gekapselten Motorgehäusen hoher IP-Schutzart mit einem geschlossenen Statorgehäuse und sich unmittelbar daran axial anschließendem Außenläuferrotor bleibt nur ein geringer, üblicherweise über eine Labyrinthdichtung abgedichteter Ringspalt, in dem eine Kühlströmung zwischen Statorgehäuse und Außenläuferrotor erzeugt werden kann. Ein derartiger gattungsgemäßer Elektromotor ist in der
Zur Kühlung sind im Stand der Technik für Außenläufermotoren weitere unterschiedlichste Kühlkonzepte bekannt.A wide variety of other cooling concepts are known in the prior art for external rotor motors.
Aus der
Es gibt ferner weitere jedoch völlig andersartige Kühlkonzepte, wie diese zum Beispiel aus der
Es besteht jedoch ein Bedürfnis, insbesondere bei Außenläufermotoren mit hohen Drehmomenten und hohen Drehzahlen ein optimiertes Gesamtmotorkonzept vorzusehen, so dass durch die Kühlung die Motorausnutzung optimiert werden kann, was mit sogenannten Standard-Außenläufermotoren mit einer rotierenden Rotorglocke mit den im Stand der Technik bekannten Maßnahmen nicht mehr effizient und wirtschaftlich realisiert werden kann.However, there is a need to provide an optimized overall motor concept, especially for external rotor motors with high torques and high speeds, so that the motor utilization can be optimized by cooling, which is not the case with so-called standard external rotor motors with a rotating rotor bell using the measures known in the prior art can be implemented more efficiently and economically.
Der Erfindung liegt daher die Aufgabe zugrunde, vorbesagte Nachteile im Stand der Technik zu überwinden und einen Elektromotor, insbesondere Au-βenläufermotor mit einer optimierten Motorausnutzung für hohe Drehmomente bereit zu stellen, dessen Kühlkonzept gleichzeitig verbessert ist.The invention is therefore based on the object of overcoming the aforementioned disadvantages in the prior art and providing an electric motor, in particular an external rotor motor, with optimized motor utilization for high torques, the cooling concept of which is improved at the same time.
Diese Aufgabe wird durch die Merkmalskombination gemäß Patentanspruch 1 gelöst.This object is achieved by the combination of features according to claim 1.
Erfindungsgemäß wird hierzu ein Elektromotor, insbesondere Außenläufermotor vorgeschlagen, mit einem Stator mit einem Statorpaket, einer drehfest angebrachten Welle, die sich in Axialrichtung A des Motors erstreckt und einer gegenüber der drehfesten Welle rotierbar angeordneten Rotorglocke.According to the invention, an electric motor, in particular an external rotor motor, is proposed for this purpose, with a stator with a stator core, a non-rotatably mounted shaft which extends in the axial direction A of the motor and a rotor bell arranged so as to be rotatable relative to the non-rotatable shaft.
Die Rotorglocke ist mittels wenigstens einem ersten statorseitigen Lagerschilds drehbar an der Welle gelagert und zwischen der Welle und dem Statorpaket ist eine diese verbindende Kühleinrichtung angeordnet, welche bei Drehung des Motors im Betrieb eine Kühlung bewirkt, indem die Kühleinrichtung hierzu eine Vielzahl von axialen Strömungsöffnungen angeordnet in Umfangsrichtung aufweist.The rotor bell is rotatably mounted on the shaft by means of at least one first stator end shield and between the shaft and the stator core there is a cooling device which connects the latter and which causes cooling when the motor rotates during operation, in that the cooling device has a large number of axial flow openings arranged in it for this purpose Has circumferential direction.
Insofern sieht die Erfindung ein spezifisches Verbindungselement zwischen der Welle und dem Statorpaket vor und zwar mit großen Öffnungen für die Luftdurchströmung und Kühlung des Stators.In this respect, the invention provides a specific connecting element between the shaft and the stator core, specifically with large openings for air to flow through and for cooling the stator.
In einer weiteren bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass die Kühleinrichtung einen die Welle verbindenden inneren Ring sowie einen das Statorpaket verbindenden äußeren Ring aufweist und einstückig mit dem inneren Ring und dem äußeren Ring stegförmige sich in Radialrichtung erstreckende Verbindungsabschnitte ausbildet. Zwischen diesen Verbindungsabschnitten befinden sich die axialen Strömungsöffnungen.In a further preferred embodiment of the invention it is provided that the cooling device has a shaft connecting the inner ring and has an outer ring connecting the stator core and forms web-shaped connecting sections which extend in the radial direction in one piece with the inner ring and the outer ring. The axial flow openings are located between these connecting sections.
Weiter vorteilhaft ist es, wenn die Verbindungsabschnitte einen zentralen Mittenabschnitt aufweisen, der jeweils in Umfangsrichtung breiter ist im Vergleich zur Breite in den benachbarten sich an diesen Mittenabschnitt jeweils beidseitig anschließende Stegabschnitte. Dies ist eine besonders wirkungsvolle und dennoch ausreichend stabile Konstruktion. Hierbei kann vorgesehen sein, dass die Querschnittsform eine im wesentlichen quadratische Grundform aufweist, deren Seitenkanten gebogen verlaufen mit ausgeprägten nasenförmig hervorstehenden Ecken.It is also advantageous if the connecting sections have a central middle section which is respectively wider in the circumferential direction compared to the width in the adjacent web sections adjoining this middle section on both sides. This is a particularly effective and yet sufficiently stable construction. Provision can be made here for the cross-sectional shape to have an essentially square basic shape, the side edges of which are curved with pronounced nose-shaped protruding corners.
In einer weiteren bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass der Querschnitt der Strömungsöffnungen in Axialrichtung betrachtet größer ist, als der Querschnitt der radial zwischen den Strömungsöffnungen befindlichen Bereichen. Eine solche beispielhafte Gestaltung wird später bei der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung näher gezeigt und beschrieben.In a further preferred embodiment of the invention, it is provided that the cross section of the flow openings, viewed in the axial direction, is larger than the cross section of the areas located radially between the flow openings. Such an exemplary design is shown and described in more detail later in the description of a preferred embodiment of the invention.
In einer ebenfalls bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass die Rotorglocke ein zweites und zwar rotorseitiges Lagerschild entweder als separates Lagerschild oder integral mit der Rotorglocke ausbildet, mit dem die Rotorglocke an der Welle drehbar gelagert ist.In a likewise preferred embodiment of the invention, it is provided that the rotor bell forms a second bearing plate on the rotor side, either as a separate bearing plate or integrally with the rotor bell, with which the rotor bell is rotatably mounted on the shaft.
Dabei ist es von Vorteil, wenn das statorseitigen Lagerschilds mit Kühlflügeln ausgebildet ist, die sich als radial verlaufende Speichen zwischen einem zentralen Lagerabschnitt und einem radial weiter außen liegenden Lagerschildabschnitt erstrecken und zwischen den Speichen Öffnungen vorgesehen sind.It is advantageous if the stator end shield is designed with cooling vanes, which extend as radial spokes between a central bearing section and a radially further outward end shield section, and openings are provided between the spokes.
Es ist weiter in einer bevorzugten Ausgestaltung des erfinderischen Konzeptes vorgesehen, dass ein Statorflansch vorgesehen ist, an dem der Elektromotor oder der Stator gelagert ist und das statorseitigen Lagerschilds mit dem Statorflansch, insbesondere über eine Labyrinthdichtung verbunden ist.It is further provided in a preferred embodiment of the inventive concept that a stator flange is provided on which the electric motor or the stator is mounted and the stator end shield is connected to the stator flange, in particular via a labyrinth seal.
Anders ausgedrückt stehen folgende konstruktive bevorzugte Lösungen zur Verfügung. Eine konstruktive Integration des statorseitigen Lagerschildes mit dem Statorflansch durch eine Labyrithausführung zur Sicherstellung einer erhöhten Schutzart, da das statorseitige Lagerschild mit großen Öffnungen ausgeführt wird, um die Motorausnutzung deutlich zu erhöhen. Eine alternative bzw. weitere Verbesserungsmaßnahme zur Erhöhung der Motorausnutzung ist die Ausführung der beiden Lagerschilder statorseitig offen, rotorseitig geschlossen mit Kühlrippen, insbesondere hergestellt aus Alu.In other words, the following constructive preferred solutions are available. Structural integration of the stator end shield with the stator flange using a labyrinth design to ensure an increased degree of protection, since the stator end shield is designed with large openings to significantly increase motor utilization. An alternative or further improvement measure to increase the motor utilization is the design of the two end shields open on the stator side and closed on the rotor side with cooling fins, in particular made of aluminum.
In einer alternativen Ausführung ist eine gegossene Rotorglocke mit eingelegtem FE-Rückschlussring und angegossenen Kühlflügeln vorgesehen kombiniert mit einem statorseitigen Lagerschild mit Kühlflügel in offener Ausführung.In an alternative design, a cast rotor bell with an inserted FE return ring and cast-on cooling blades is provided, combined with an open design of a stator end shield with a cooling blade.
In einer ebenfalls bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass in Radialrichtung betrachtet zwischen der Kühleinrichtung und Bereichen im Statorpaket, der für die Statorspulen vorgesehen ist, in Umlaufrichtung angebrachte elektrische Anschlussringe aufweisend Anschlussdrähte zur elektrischen Verbindung der Spulen vorgesehen sind. Besonders günstig ist es, wenn vier elektrische Anschlussringe für die Versorgung vorgesehen sind, so dass eine Versorgung mit den 3 Phasen L1, L2, L3 und dem Neutralleiter N ermöglicht werden.Another preferred embodiment of the invention provides that, viewed in the radial direction, between the cooling device and areas in the stator core that is provided for the stator coils, electrical connection rings mounted in the circumferential direction and having connection wires for electrically connecting the coils are provided. It is particularly favorable if four electrical connection rings are provided for the supply, so that a supply with the 3 phases L1, L2, L3 and the neutral conductor N is made possible.
Grundsätzlich sind alle offenbarten Merkmale beliebig kombinierbar, soweit dies technisch möglich und sinnvoll ist.In principle, all features disclosed can be combined as desired, provided this is technically possible and reasonable.
Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet bzw. werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Figuren näher dargestellt. Es zeigen:
- Fig. 1
- einen Elektromotor in einer Schnittdarstellung;
- Fig. 2
- eine perspektivische Ansicht auf einen Elektromotor mit der Ansichtseite des statorseitigen Lagerschilds;
- Fig. 3
- eine Draufsicht auf die Kühleinrichtung zwischen der Welle und dem Statorpaket und
- Fig. 4
- eine Draufsicht auf die Kühleinrichtung zwischen der Welle und dem Statorpaket
- 1
- an electric motor in a sectional view;
- 2
- a perspective view of an electric motor with the viewing side of the stator end shield;
- 3
- a plan view of the cooling device between the shaft and the stator core and
- 4
- a top view of the cooling device between the shaft and the stator core
Im Folgenden wird die Erfindung anhand ausgewählter Ausführungsbeispiel näher erläutert, wobei gleiche Bezugszeichen strukturell oder funktional gleiche Teile in den Ansichten benennen.The invention is explained in more detail below using selected exemplary embodiments, with the same reference symbols denoting structurally or functionally the same parts in the views.
In
Ferner ist eine Rotorglocke 30 vorgesehen, die gegenüber der drehfesten Welle 20 rotierbar angeordnet. Die Rotorglocke 30 besitzt einen rohrförmigen Außenmantel AM und ein statorseitiges Lagerschild 31, das am Außenmantel der Rotorglocke 30 mit Befestigungsmittel B befestigt ist. Das statorseitiges Lagerschild 31 ist mittels Lager L an der Welle 20 gelagert.A
Wie in der
In der
Das statorseitigen Lagerschild 31 ist mit Kühlflügeln ausgebildet, die sich als radial verlaufende Speichen 33 zwischen einem zentralen Lagerabschnitt 34 und einem radial weiter außen liegenden Lagerschildabschnitt 35 erstrecken und zwischen den Speichen 33 sind Öffnungen 36 vorgesehen.The
Am Ende der Welle 20 befindet sich ein weiteres Lager L an dem die Rotorglocke 30 über ein zweites und zwar rotorseitiges Lagerschild 32 drehbar gelagert ist. Das rotorseitige Lagerschild 32 ist ebenfalls über Befestigungsmittel B an der Rotorglocke 30 befestigt und weist eine geschlossene Struktur auf, um einen entsprechenden Schutz gegen Umwelteinwirkungen (z. B Schutzgrad IP 54) zu gewährleisten.At the end of the
Zwischen der Welle 20 und dem Statorpaket 11 ist eine diese beiden Teile verbindende Kühleinrichtung 40 angeordnet ist. Diese ist konzeptionell so ausgestaltet, dass bei Drehung des Motors im Betrieb eine Kühlung auf den Stator bewirkt wird, indem die Kühleinrichtung 40 hierzu eine Vielzahl von axialen Strömungsöffnungen 41 angeordnet in Umfangsrichtung aufweist. Somit kann ein Luftstrom entlang dem Stator 10 bewirkt werden und eine effiziente Kühlung von innen her erzeugt werden. Das Design ist in der
Die Verbindungsabschnitte 44 besitzen einen zentralen Mittenabschnitt 45, der jeweils in Umfangsrichtung breiter ist im Vergleich zur Breite in den benachbarten sich an diesen Mittenabschnitt 45 jeweils beidseitig anschließende Stegabschnitte 46. Die beiden Seiten verlaufen bogenförmig nach innen gekrümmt und besitzen jeweils nasenförmige Eckvorsprünge 47.The connecting portions 44 have a central
Der effektive Querschnitt der Strömungsöffnungen 41 in Axialrichtung betrachtet ist größer, als der Querschnitt der radial zwischen den Strömungsöffnungen 41 befindlichen Bereichen. Somit wird eine gute und effiziente Strömung erreicht.The effective cross section of the
Wie in der
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf die vorstehend angegebenen bevorzugten Ausführungsbeispiele. Vielmehr ist eine Anzahl von Varianten denkbar, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch macht. So kann das Lagerschild 32 zum Beispiel auch integral mit der Rotorglocke 30 ausgebildet sein.The implementation of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the solution shown even in the case of fundamentally different designs. For example, the
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021120672.3A DE102021120672A1 (en) | 2021-08-09 | 2021-08-09 | Electric motor with improved cooling |
Publications (1)
Publication Number | Publication Date |
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EP4135170A1 true EP4135170A1 (en) | 2023-02-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22187208.8A Pending EP4135170A1 (en) | 2021-08-09 | 2022-07-27 | Electric motor with improved cooling |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230043968A1 (en) |
EP (1) | EP4135170A1 (en) |
CN (1) | CN115706490A (en) |
DE (1) | DE102021120672A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10313274A1 (en) | 2002-08-01 | 2004-02-12 | Ebm Werke Gmbh & Co. Kg | Electric motor with high IP protection |
DE102012107107A1 (en) | 2012-08-02 | 2014-02-06 | Ebm-Papst Mulfingen Gmbh & Co. Kg | "Active cooling of an engine" |
DE102015118695A1 (en) | 2015-11-02 | 2017-05-04 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Electric motor with improved cooling |
US20170361900A1 (en) * | 2016-03-07 | 2017-12-21 | Future Motion, Inc. | Thermally enhanced hub motor |
US20180274546A1 (en) * | 2017-03-23 | 2018-09-27 | Sunonwealth Electric Machine Industry Co., Ltd. | Ceiling Fan Motor |
DE102018215787A1 (en) * | 2018-09-18 | 2020-03-19 | Robert Bosch Gmbh | Stator for an electrical machine, an electrical machine and method for producing an electrical machine |
WO2020145219A1 (en) * | 2019-01-08 | 2020-07-16 | 日本電産株式会社 | Motor and rotating blade apparatus |
CN112003403A (en) * | 2020-05-29 | 2020-11-27 | 卧龙电气驱动集团股份有限公司 | Hybrid cooling outer rotor permanent magnet motor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI509953B (en) | 2013-12-24 | 2015-11-21 | Sunonwealth Electr Mach Ind Co | Motor of ceiling fan |
DE102017212798A1 (en) * | 2017-07-26 | 2019-01-31 | Siemens Aktiengesellschaft | Electric motor with cooling device |
US11342812B2 (en) | 2017-09-29 | 2022-05-24 | Nidec Corporation | Motor |
-
2021
- 2021-08-09 DE DE102021120672.3A patent/DE102021120672A1/en active Pending
-
2022
- 2022-07-27 EP EP22187208.8A patent/EP4135170A1/en active Pending
- 2022-08-03 CN CN202210930042.XA patent/CN115706490A/en active Pending
- 2022-08-04 US US17/881,054 patent/US20230043968A1/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10313274A1 (en) | 2002-08-01 | 2004-02-12 | Ebm Werke Gmbh & Co. Kg | Electric motor with high IP protection |
DE102012107107A1 (en) | 2012-08-02 | 2014-02-06 | Ebm-Papst Mulfingen Gmbh & Co. Kg | "Active cooling of an engine" |
DE102015118695A1 (en) | 2015-11-02 | 2017-05-04 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Electric motor with improved cooling |
US20170361900A1 (en) * | 2016-03-07 | 2017-12-21 | Future Motion, Inc. | Thermally enhanced hub motor |
US20180274546A1 (en) * | 2017-03-23 | 2018-09-27 | Sunonwealth Electric Machine Industry Co., Ltd. | Ceiling Fan Motor |
DE102018215787A1 (en) * | 2018-09-18 | 2020-03-19 | Robert Bosch Gmbh | Stator for an electrical machine, an electrical machine and method for producing an electrical machine |
WO2020145219A1 (en) * | 2019-01-08 | 2020-07-16 | 日本電産株式会社 | Motor and rotating blade apparatus |
CN112003403A (en) * | 2020-05-29 | 2020-11-27 | 卧龙电气驱动集团股份有限公司 | Hybrid cooling outer rotor permanent magnet motor |
Also Published As
Publication number | Publication date |
---|---|
DE102021120672A1 (en) | 2023-02-09 |
US20230043968A1 (en) | 2023-02-09 |
CN115706490A (en) | 2023-02-17 |
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